5409646821 has 12 divisors (see below), whose sum is σ = 7815512640. Its totient is φ = 3605702760.

The previous prime is 5409646813. The next prime is 5409646849. The reversal of 5409646821 is 1286469045.

It is not a de Polignac number, because 5409646821 - 2³ = 5409646813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5409646421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11581 + ... + 104658.

It is an arithmetic number, because the mean of its divisors is an integer number (651292720).

Almost surely, 2^5409646821 is an apocalyptic number.

It is an amenable number.

5409646821 is a deficient number, since it is larger than the sum of its proper divisors (2405865819).

5409646821 is a wasteful number, since it uses less digits than its factorization.

5409646821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121416 (or 121413 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 5409646821 is about 73550.3012978193. The cubic root of 5409646821 is about 1755.4547427539.

The spelling of 5409646821 in words is "five billion, four hundred nine million, six hundred forty-six thousand, eight hundred twenty-one".